1406146081 has 4 divisors (see below), whose sum is σ = 1451505664. Its totient is φ = 1360786500.

The previous prime is 1406146073. The next prime is 1406146087. The reversal of 1406146081 is 1806416041.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 1806416041 = 163 ⋅11082307.

It is a cyclic number.

It is not a de Polignac number, because 1406146081 - 2³ = 1406146073 is a prime.

It is a super-2 number, since 2×1406146081² = 3954493602223317122, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (31), and also a Moran number because the ratio is a prime number: 45359551 = 1406146081 / (1 + 4 + 0 + 6 + 1 + 4 + 6 + 0 + 8 + 1).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1406146087) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 22679745 + ... + 22679806.

It is an arithmetic number, because the mean of its divisors is an integer number (362876416).

Almost surely, 2^1406146081 is an apocalyptic number.

It is an amenable number.

1406146081 is a deficient number, since it is larger than the sum of its proper divisors (45359583).

1406146081 is an equidigital number, since it uses as much as digits as its factorization.

1406146081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45359582.

The product of its (nonzero) digits is 4608, while the sum is 31.

The square root of 1406146081 is about 37498.6143877344. The cubic root of 1406146081 is about 1120.3235887387.

The spelling of 1406146081 in words is "one billion, four hundred six million, one hundred forty-six thousand, eighty-one".